Cam means for ball valve seat rings

Details Cam means for ball valve seat rings Cam means for ball valve seat rings

1979-06-29

1981-04-21

Schwadron, Martin P.

Fluid handling

With repair, tapping, assembly, or disassembly means

Assembling, disassembling, or removing cartridge type valve

251174, 251287, 251315, 251316, F16K 4300, F16K 2500

Patent

active

042626919

ABSTRACT:
A ball valve in which cams (82, 84) are mounted on the ball member (34) to engage spring biased seat rings (30, 32) and cam the seat rings to a retracted position at which the seat rings are retained. The ball valve has a removable cover plate (16) so that the ball member (34) and seat rings may be subsequently removed from the valve body (12) while the valve remains in-line. A removable stop (56) engages and blocks rotation of the ball member past its fully opened and fully closed positions and the cams (82, 84) engage the seat rings only after the stop is removed and the ball member is rotated past its normal stroke and beyond fully opened or fully closed positions.

REFERENCES:
patent: 1293753 (1919-02-01), Gibson
patent: 2030150 (1936-02-01), Mueller
patent: 2086001 (1937-07-01), Shaw
patent: 3114386 (1963-12-01), Dumm
patent: 3171429 (1965-03-01), Stumer
patent: 3269691 (1966-08-01), Meima et al.
patent: 3771545 (1973-11-01), Allen
patent: 4151855 (1979-05-01), Levin et al.
patent: 4175577 (1979-11-01), Kacal et al.

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